WEBVTT

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あるバスケットボールチームの統計家が

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ある 1 回の試合における

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チームの12 人の選手の得点の統計を取りました

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そして，調べたデータを幹葉表示（みきはひょうじ）で表しました

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または，かんようひょうじ，と呼ばれることもあります

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さて，このチームは，どれだけ得点したでしょうか？

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もしこの図を見るのが初めてだとしたら

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ちょっと理解するのが難しいかもしれません

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幹とされる欄に 0 1 2
とあって

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こちらには様々な数字が並んでいます

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この表は，チームのそれぞれの選手の得点と

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どのように関係しているのでしょうか

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幹葉表示の読み方はですね，

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葉は，
--少なくともこの統計家が用いた表示方法によれば--

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葉は，それぞれの選手の得点の
最も低い位の数，

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または，一の位の数を表しています

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そして，幹は，
十の位の数を示しています

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慣習では，葉が最も低い位の数，または，一の位の数を

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そして，幹は，

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それ以外の桁を表します

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そして，この表の便利なところは，

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得点数に応じた選手の分布を可視化していることです

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多くの選手の得点の十の位が 0 で，つまり

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得点が一桁であったことが一目でわかります

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そして，十の位が 1 
つまり 10 点台の選手，

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そして，十の位が 2 
つまり 20 点台の得点をした選手は一人だけだった

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ということが読み取れます

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では，これらのデータを，
私たちが見慣れているやり方で

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表示してみようと思います

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